rspec/rules/S3400/swift/rule.adoc

There's no point in forcing the overhead of a function or method call for a function that always returns the same constant value. Even worse, the fact that a function call must be made will likely mislead developers who call the method thinking that something more is done. Declare a constant instead. 

This rule raises an issue on functions that contain only one  statement: the ``return`` of a constant value. 

== Noncompliant Code Example

----
func getBestNumber() -> Int {
  return 12  // Noncompliant
}
----

== Compliant Solution

----
let bestNumber = 12;
----

== Exceptions

Methods which are members of a class having a type inheritance clause are ignored.